What is the source of a funky smell coming from the AC/Heat air vents?.?

Everytime the AC or Heat is turned on in my 98 Jeep Grand Cherokee, there is an initial blast of a musty, moldy smell that comes out of the vents. It is similar to the dank smell you get when you forget to take the clothes out of the washer to put in the dryer. Any ideas of where it's coming from? And how to get rid of it? I've tried changing the air filter, but that doesn't seem to be the thing that is musty. Is there another filter of some sort that perhaps got wet?What is the source of a funky smell coming from the AC/Heat air vents?.?it may be a dead animal! one time there was a foul smell coming from through the vents and my dad found out that it was a dead rat under the hood! Yucks!!!What is the source of a funky smell coming from the AC/Heat air vents?.?It is likely that your evaporator coil is very dirty. Air blows over this coil before it reaches the inside of you home. When it gets moist, it will mildew in time, thus the moldy smell. Your coils (condenser and evaporator) need to be cleaned by a tech about once a year.

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What is the source of a funky smell coming from the AC/Heat air vents?.?The first thing that comes to my mind is check and see if you have a leak in your heater core. I am not sure where it is located on your particular unit. If it is leaking, the carpet my be wet on the passengers side. Like I say, I am not up on your model, it may be under the hood, either way, it will be enclosed in the duct work, and could be a source of this smell, if that is the problem.What is the source of a funky smell coming from the AC/Heat air vents?.?something dead in itWhat is the source of a funky smell coming from the AC/Heat air vents?.?Could be anything but I will address the most common issue.



Exactly what it smells like... Mold from moisture most likely. Humidity, condensation or whatever it got moist. Then molded. At places like AutoZone or Pep Boys they sell a sprayer that kills mold. Buy it then follow directions to fumigate your vent system without having to dissasemble it.



Also sometimes a leaking heater core can let antifreeze into the vent area and it will make a similar smell but usually more sickly sweet.